PAYC · Paycom Software, Inc.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 1,353 unvested shares of restricted stock.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 1,353 unvested shares of restricted stock.

Represents shares of common stock owned by the Charis Michelle Richison Trust (the "Spouse Trust"). The Spouse Trust is a revocable trust for the benefit of the reporting person's spouse. The reporting person may be deemed to beneficially own the shares of common stock owned by the Spouse Trust.

Includes 100,593 unvested restricted stock units.

Includes 17,318 unvested restricted stock units and 25,677 unvested shares of restricted stock.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the following awards: (i) 42 shares of restricted stock granted to the reporting person on April 30, 2023; (ii) 625 shares of restricted stock granted to the reporting person on December 28, 2023; and (iii) 97 shares of restricted stock granted to the reporting person on February 23, 2024. No shares were issued or sold in this transaction.

Includes 17,318 unvested restricted stock units and 25,677 unvested shares of restricted stock.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the following awards: (i) 225 shares of restricted stock granted to the reporting person on February 2, 2022; (ii) 209 shares of restricted stock granted to the reporting person on February 4, 2023; (iii) 1,250 shares of restricted stock granted to the reporting person on December 4, 2023; (iv) 287 shares of restricted stock granted to the reporting person on February 23, 2024; (v) 5,000 shares of restricted stock granted to the reporting person on October 18, 2024; and (vi) 1,258 shares of restricted stock granted to the reporting person on March 2, 2025. No shares were issued or sold in this transaction.

Includes 20,950 unvested restricted stock units and 12,936 unvested shares of restricted stock.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 2,989 unvested shares of restricted stock.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 2,989 unvested shares of restricted stock.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 2,989 unvested shares of restricted stock.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 2,989 unvested shares of restricted stock.

Represents shares of restricted stock granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 2,989 unvested shares of restricted stock.

Represents restricted stock units granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 13,967 unvested restricted stock units.

Represents restricted stock units granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 20,950 unvested restricted stock units and 21,165 unvested shares of restricted stock.

Represents restricted stock units granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 24,350 unvested restricted stock units and 3,750 unvested shares of restricted stock.

Represents restricted stock units granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 100,593 unvested restricted stock units.

Represents restricted stock units granted to the reporting person under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 17,318 unvested restricted stock units and 26,441 unvested shares of restricted stock.

Represents shares of common stock of the Issuer withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the performance-based restricted stock units described in footnote (1) above. No shares were sold in this transaction.

Includes 28,766 unvested restricted stock units.

Represents shares of common stock of the Issuer withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the performance-based restricted stock units described in footnote (1) above. No shares were sold in this transaction.

Includes 6,393 unvested restricted stock units and 3,750 unvested shares of restricted stock.

Represents shares of common stock of the Issuer withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the performance-based restricted stock units described in footnote (1) above. No shares were sold in this transaction.

Includes 26,441 unvested shares of restricted stock and 7,342 unvested restricted stock units.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") acquired by the reporting person upon the vesting of performance-based restricted stock units granted to the reporting person on February 21, 2025, under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 28,766 unvested restricted stock units.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") acquired by the reporting person upon the vesting of performance-based restricted stock units granted to the reporting person on February 21, 2025, under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 26,441 unvested shares of restricted stock and 7,342 unvested restricted stock units.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") acquired by the reporting person upon the vesting of performance-based restricted stock units granted to the reporting person on February 21, 2025, under the Paycom Software, Inc. 2023 Long-Term Incentive Plan.

Includes 6,393 unvested restricted stock units and 3,750 unvested shares of restricted stock.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of the following awards: (i) 6,375 shares of restricted stock granted to the reporting person on May 30, 2024; and (ii) 1,748 restricted stock units granted to the reporting person on May 30, 2024; and (iii) 2,796 restricted stock units granted to the reporting person on February 21, 2025. No shares were sold in this transaction.

Includes 26,441 unvested shares of restricted stock and 7,342 unvested restricted stock units.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 3,196 shares of restricted stock units granted to the reporting person on February 21, 2025. No shares were sold in this transaction.

Includes 6,393 unvested restricted stock units and 3,750 unvested shares of restricted stock.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 14,382 restricted stock units granted to the reporting person on February 21, 2025. No shares were sold in this transaction.

Includes 28,766 unvested restricted stock units.

Includes 9,589 unvested restricted stock units and 3,750 unvested shares of restricted stock.

Includes 32,816 unvested shares of restricted stock and 11,886 unvested restricted stock units.

Includes 32,816 unvested shares of restricted stock and 11,886 unvested restricted stock units.

Includes 32,816 unvested shares of restricted stock and 11,886 unvested restricted stock units.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Sage Elizabeth Richison 2022 Irrevocable Trust (the "SER Trust"). The reporting person is the settlor and sole trustee for the SER Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the SER Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Kase Gabriel Richison 2022 Irrevocable Trust (the "KGR Trust"). The reporting person is the settlor and sole trustee for the KGR Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the KGR Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Lane West Richison 2022 Irrevocable Trust (the "LWR Trust"). The reporting person is the settlor and sole trustee for the LWR Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the LWR Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Rome West Pedersen 2023 Irrevocable Trust (the "RWP Trust"). The reporting person is the settlor and sole trustee for the RWP Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the RWP Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Ava L. Richison 2012 Irrevocable Trust (the "ALR Trust"). The reporting person is the settlor and sole trustee for the ALR Trust, which is for the benefit of the reporting person's child. The reporting person may be deemed to beneficially own the shares of common stock owned by the ALR Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Faye Penelope Richison 2023 Irrevocable Trust (the "FPR Trust"). The reporting person is the settlor and sole trustee for the FPR Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the FPR Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Charles Banks Pedersen 2022 Irrevocable Trust (the "CBP Trust"). The reporting person is the settlor and sole trustee for the CBP Trust, which is for the benefit of the reporting person's grandchild. The reporting person may be deemed to beneficially own the shares of common stock owned by the CBP Trust.

Represents shares received pursuant to a gift from the reporting person.

Represents shares of common stock owned by the Ian D. Richison 2012 Irrevocable Trust (the "IDR Trust"). The reporting person is the settlor and sole trustee for the IDR Trust, which is for the benefit of the reporting person's child. The reporting person may be deemed to beneficially own the shares of common stock owned by the IDR Trust.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of 3,750 shares of restricted stock granted to the reporting person on November 14, 2022. No shares were sold in this transaction.

Includes 9,589 unvested restricted stock units and 3,750 unvested shares of restricted stock.

Represents shares of common stock of Paycom Software, Inc. (the "Issuer") withheld by the Issuer to satisfy tax withholding obligations in connection with the vesting of an award of 125 shares of restricted stock granted to the reporting person on October 25, 2022. No shares were sold in this transaction.

Includes 9,326 unvested shares of restricted stock.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $225.63 to $225.81, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $222.01 to $223.00, inclusive. The reporting person undertakes to provide to Paycom Software, Inc. (the "Issuer"), any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $223.04 to $223.97, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $224.56 to $225.46, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $249.51 to $250.50, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $246.50 to $247.48, inclusive. The reporting person undertakes to provide to Paycom Software, Inc. (the "Issuer"), any security holder of the Issuer or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.

The sales reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Bradley Scott Smith Revocable Trust, dated October 30, 2017 (the "Bradley Scott Smith Revocable Trust"), on December 12, 2024.

The price reported is a weighted average price. These shares of common stock were sold in multiple transactions at prices ranging from $247.65 to $248.34, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the SEC, upon request, full information regarding the number of shares sold in the transactions at each separate price within the range set forth in this footnote.

The Bradley Scott Smith Revocable Trust is a revocable trust for the benefit of the reporting person, his spouse, and his children. The reporting person is the trustor and, with his spouse, a co-trustee of the Bradley Scott Smith Revocable Trust. Accordingly, the reporting person reports beneficial ownership of all of the shares of common stock held by the Bradley Scott Smith Revocable Trust but disclaims beneficial ownership except to the extent of his and his spouse's pecuniary interest therein.